CVE-2020-3574
Description
A vulnerability in the TCP packet processing functionality of Cisco IP Phones could allow an unauthenticated, remote attacker to cause the phone to stop responding to incoming calls, drop connected calls, or unexpectedly reload. The vulnerability is due to insufficient TCP ingress packet rate limiting. An attacker could exploit this vulnerability by sending a high and sustained rate of crafted TCP traffic to the targeted device. A successful exploit could allow the attacker to impact operations of the phone or cause the phone to reload, leading to a denial of service (DoS) condition.
How to fix
- cisco ip_dect_210_firmware4.8.1 or later
- cisco ip_dect_6825_firmware4.8.1 or later
- cisco ip_phone_8811_firmware11.3.2 or later
- cisco ip_phone_8841_firmware11.3.2 or later
- cisco ip_phone_8851_firmware11.3.2 or later
- cisco ip_phone_8861_firmware11.3.2 or later
- cisco webex_room_phone_firmware1.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ip_dect_210_firmware | v < 4.8.1 | 4.8.1 |
| cisco ip_dect_6825_firmware | v < 4.8.1 | 4.8.1 |
| cisco ip_phone_8811_firmware | v < 11.3.2 | 11.3.2 |
| cisco ip_phone_8841_firmware | v < 11.3.2 | 11.3.2 |
| cisco ip_phone_8851_firmware | v < 11.3.2 | 11.3.2 |
| cisco ip_phone_8861_firmware | v < 11.3.2 | 11.3.2 |
| cisco unified_ip_conference_phone_8831_firmware | 9.3\(4\) | — |
| cisco webex_room_phone_firmware | v < 1.2.0 | 1.2.0 |
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